Fan.



G. B. GRIFFIN.

FAN.

APPLICATION FILED APR. 21, 1910. 1,173,568. Patented Feb.29,1916.

Fig.1.

WITNESSES: 61603 44 ATTORNEY WTTED TATE PATENT @FFTQE.

GEORGE B. GRIFFIN, or EnGEwoon, PENNS LVAN A, ASsIGNoE To WESTINGHOUSE ELECTRIC ANn MANUFACTURING COMPANY, A CORPORATION or PENNSYLVANIA.

EAN.

rirases Application filed April '21, 1910.

To all whom it may concern Be it known that I, GEORGE B. GRIFFIN, a citizen of the United States, and a r'esident of Edgewood, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Fans, of which the following is a specification.

My invention relates to motor-driven fans and it has for one of its objects to provide an inexpensive and easily manufactured guard for the fan blades, and, for a further object, to provide means for readily attaching guards of different sizes, in accordance with the dimensions of the blades which are employed.

It is usual, in the manufacture of desk or wall bracket fans which are driven by electric motors or otherwise to provide skeleton guards for the fan blades in order that users of such fans may be protected from injury which would result from contact with the rapidly rotating fan blades. Such guards have been heretofore usually formed of pieces of wire, bent into various forms and fastened to the motor frame by means of bracket arms. Such guards as have been heretofore usually employed have been relatively expensive in construction and each guard was provided with bracket arms, the dimensions of which correspond to the dimensions of the guard and the fan blades in connection with which the guard was to be used.

In accordance with my present invention, I propose to simplify the guard structure by forming it mainly of expanded metal and also to provide supporting bracket arms which may be readily adapted for use with fan blades and guards of any dimensions, within comparatively wide limits.

In the accompanying drawing, Figure 1 is a view, in front elevation, of a fan provided with a guard and supporting devices embodying my invention. Figs. 2, 3, 4 and 5 are detail views of some of the parts shown in Fig. 1.

Referring to the structural details shown in the drawing, the guard 1 for the fan blades 2 is formed mainly of expanded metal, the meshes of which are here shown as of diamond shape and the ends of the several portions of which are bent around a ring 3 in the form of loops 4, the spacing of these loops around the ring being unsym- S'pe'cifi'cation of Letters Patent.

Patented Feb. 279 191$.

Serial No. 556,873.

metrical by reason of the structural characteristics of the expanded metal blank which is utilized. The ring 3-, to which the projecting ends of the expanded metal structure are fastened, is supported upon the frame 5 of the motor by means of bracket arms 6, the inner ends of which are fastened to the motor frame by means of screws 7 and the outer end of each of which is provided with a side boss 8. A clamping piece 9 is fastened to the boss 8 by means of a screw 10, a slot 11 being formed in the piece 9 for the reception of the screw 10 in order that some degree of longitudinal adjustment may be permitted.

When the bracket arms 6 are utilized for supporting a guard frame of the maximum dimensions for which said bracket arms are intended, the arms are disposed radially or substantially so. In case it is desired to utilize the said bracket arms for supporting guards of lesser diameter, as indicated, for example, by the ring 12 in Fig. 1, the

arms 6 are turned upon the screws 7 as pivots until the spaces between the clamping pieces 9 and the outer ends of the main body portion are in position to receive the said ring. The slots 11 in the members 9 permit of such longitudinal adjustment of said parts 9 in order to receive the ring 12 when the parts are in their adjusted positions. After the adjustment is effected, the screws 7 and 10 may be turned to clamp the parts rigidly in position.

The bracket arms 6 may be attached to the ring 3 or the ring 12 otherwise than by the means here shown, and the structural details may be otherwise varied from what is shown without departing from the spirit and scope of my invention.

I claim as my invention:

1. A guard for the blades of a fan comprising a ring and an expanded metal body portion, the free ends of which are bent around said ring, in combination with angularly adjustable supporting arms the outer ends of which are detachably clamped to said ring.

2. In a fan motor, the combination with a fan blade guard comprising a ring and an expanded metal body portion having its free ends bent around said ring, of angularly adjustable supporting bracket arms the outer ends of which are attached to said ring.

3. In a fan motor, a plurality of angularly adjustable guard-supporting bracket arms the inner ends of Which are pivotally attached to the motor frame and the outer ends of Which are provided with means for ing bracket arms pivotally mounted on said frame, said arms comprising adjustable members upon the outer ends of the same.

6. In a fan motor, the combination With the motor frame, of a plurality of guardsupporting bracket arms pivotally mounted thereon and angularly adjustable relatively thereto, said arms comprising means for adjustably securing the outer ends of the said arms to guard rings of different sizes.

In testimony whereof, I have hereunto subscribed my name this 31st day'of March,

GEORGE B. GRIFFIN. Witnesses A. R. NATCHER, B. B. HINES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

